Move SerialNumberPreferenceController to SettingsLib

/*

 * Copyright (C) 2017 The Android Open Source Project

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package com.android.settingslib.deviceinfo;

import android.content.Context;

import android.os.Build;

import android.support.v7.preference.Preference;

import android.support.v7.preference.PreferenceScreen;

import android.text.TextUtils;

import com.android.internal.annotations.VisibleForTesting;

import com.android.settingslib.core.AbstractPreferenceController;

/**

 * Preference controller for displaying device serial number. Wraps {@link Build#getSerial()}.

 */

public class AbstractSerialNumberPreferenceController extends AbstractPreferenceController {

    private static final String KEY_SERIAL_NUMBER = "serial_number";

    private final String mSerialNumber;

    public AbstractSerialNumberPreferenceController(Context context) {

        this(context, Build.getSerial());

    }

    @VisibleForTesting

    AbstractSerialNumberPreferenceController(Context context, String serialNumber) {

        super(context);

        mSerialNumber = serialNumber;

    }

    @Override

    public boolean isAvailable() {

        return !TextUtils.isEmpty(mSerialNumber);

    }

    @Override

    public void displayPreference(PreferenceScreen screen) {

        super.displayPreference(screen);

        final Preference pref = screen.findPreference(KEY_SERIAL_NUMBER);

        if (pref != null) {

            pref.setSummary(mSerialNumber);

        }

    }

    @Override

    public String getPreferenceKey() {

        return KEY_SERIAL_NUMBER;

    }

}

/*

 * Copyright (C) 2017 The Android Open Source Project

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package com.android.settingslib.deviceinfo;

import static com.google.common.truth.Truth.assertThat;

import static org.mockito.Answers.RETURNS_DEEP_STUBS;

import static org.mockito.Matchers.any;

import static org.mockito.Matchers.anyString;

import static org.mockito.Mockito.mock;

import static org.mockito.Mockito.never;

import static org.mockito.Mockito.verify;

import static org.mockito.Mockito.when;

import android.content.Context;

import android.support.v7.preference.Preference;

import android.support.v7.preference.PreferenceScreen;

import com.android.settingslib.SettingsLibRobolectricTestRunner;

import com.android.settingslib.TestConfig;

import org.junit.Before;

import org.junit.Test;

import org.junit.runner.RunWith;

import org.mockito.Mock;

import org.mockito.MockitoAnnotations;

import org.robolectric.annotation.Config;

@RunWith(SettingsLibRobolectricTestRunner.class)

@Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION)

public class SerialNumberPreferenceControllerTest {

    @Mock(answer = RETURNS_DEEP_STUBS)

    private Context mContext;

    @Mock(answer = RETURNS_DEEP_STUBS)

    private PreferenceScreen mScreen;

    private AbstractSerialNumberPreferenceController mController;

    @Before

    public void setUp() {

        MockitoAnnotations.initMocks(this);

    }

    @Test

    public void testIsAvaiable_noSerial_shouldReturnFalse() {

        mController = new ConcreteSerialNumberPreferenceController(mContext, null);

        assertThat(mController.isAvailable()).isFalse();

    }

    @Test

    public void testIsAvaiable_hasSerial_shouldReturnTrue() {

        mController = new ConcreteSerialNumberPreferenceController(mContext, "123");

        assertThat(mController.isAvailable()).isTrue();

    }

    @Test

    public void testDisplay_noSerial_shouldHidePreference() {

        final Preference preference = mock(Preference.class);

        when(mScreen.getPreferenceCount()).thenReturn(1);

        when(mScreen.getPreference(0)).thenReturn(preference);

        mController = new ConcreteSerialNumberPreferenceController(mContext, null);

        when(preference.getKey()).thenReturn(mController.getPreferenceKey());

        mController.displayPreference(mScreen);

        verify(mScreen).removePreference(any(Preference.class));

    }

    @Test

    public void testDisplay_hasSerial_shouldSetSummary() {

        final String serial = "123";

        final Preference preference = mock(Preference.class);

        when(mScreen.findPreference(anyString())).thenReturn(preference);

        mController = new ConcreteSerialNumberPreferenceController(mContext, serial);

        mController.displayPreference(mScreen);

        verify(mScreen, never()).removePreference(any(Preference.class));

        verify(preference).setSummary(serial);

    }

    private static class ConcreteSerialNumberPreferenceController

            extends AbstractSerialNumberPreferenceController {

        ConcreteSerialNumberPreferenceController(Context context, String serialNumber) {

            super(context, serialNumber);

        }

    }

}